Prediction of delayed subsidence

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:5570320

Burns, K

Contrary to active subsidence, which occurs concurrently with mining operations, or is completed within a few days following coal extraction, delayed subsidence may take many years to appear at the surface after coal mines are abandoned. There are two principal morphological types of delayed subsidence: troughs, which are shallow depressions, and sinks, which are steep-sided crown pits. Both types are damaging to surface structures, and a variety of methods have been introduced to deal with the problem, ranging from subsidence insurance to site restitution. In planning insurance of restitution measures, a predictive model is of value in estimating the magnitude of the problem and the size of long-term budgetary commitments. Only one model developed for the Bureau of Mines by GAI Consultants of Monroeville is known. The GAI model is presented in qualitative terms. This report develops a formal basis for the model and tests a numerical implementation on one of the best-described study areas, Allegheny County in Pennsylvania.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5570320
• Report Number(s): LA-UR-82-286; CONF-811173-3; ON: DE82010431
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
012000 -- Coal
Lignite
& Peat-- Mining
BUILDINGS
COAL MINING
DAMAGE
FORECASTING
GROUND SUBSIDENCE
MATHEMATICAL MODELS
MINING
UNDERGROUND MINING